High Carbon Heat-Resistant Stainless Steel for Extreme Temperature Service
1. What is a Seamless TP310H Stainless Steel Pipe?
Seamless TP310H stainless steel pipe (UNS S31009 / W.Nr. 1.4845) is a high-carbon austenitic heat-resistant stainless steel pipe designed for extreme high-temperature service environments.
Manufactured via a seamless process (hot piercing + cold finishing) from a solid billet, TP310H offers:
- Uniform microstructure
- No weld seam defects
- Superior pressure-bearing capability
- Excellent reliability under thermal cycling
The “H” grade indicates a controlled higher carbon content (0.04%–0.10%), which significantly improves:
- Creep rupture strength
- High-temperature mechanical stability
- Resistance to deformation under long-term stress
TP310H retains the excellent oxidation and scaling resistance of TP310, while providing enhanced structural strength for demanding high-temperature applications.
2. Key Features & Technical Advantages
Exceptional High-Temperature Strength (Up to 1150°C)
Performs in continuous service up to 1150°C (2100°F) with excellent resistance to oxidation and scaling.
Superior Creep & Rupture Resistance
Higher carbon content enhances creep strength, reducing deformation under sustained high-temperature stress.
Excellent Oxidation Resistance
High chromium (24–26%) and nickel (19–22%) content forms a stable protective oxide layer in high-temperature air.
Resistance to Carburization & Sulfidation
Performs well in carburizing, nitriding, and sulfur-bearing atmospheres, commonly found in industrial furnaces and petrochemical processes.
Seamless Structural Integrity
Eliminates weld-related weaknesses, ensuring uniform corrosion resistance and mechanical reliability, in compliance with:
- ASTM A312
- ASME SA312
Good Fabrication Properties
Despite its high alloy content, TP310H maintains good ductility and toughness, allowing bending, forming, and welding.
Product Specifications and Data
To provide a comprehensive overview of this high-performance material, here are the detailed technical specifications and performance data for 310H stainless steel.
The composition of Stainless Steel 310H is carefully balanced to achieve its superior high-temperature strength and oxidation resistance.
Key Point:
Thehigh Cr-Ni balance provides excellent resistance to oxidation, while the higher carbon content enhances high-temperature strength and creep resistance.
Stainless Steel 310H is specifically designed to maintain its strength and shape in high-stress, high-temperature environments.
These physical properties highlight the material’s ability to perform reliably under a wide range of conditions.
Common Industrial Applications
TP310H seamless pipes are widely used in extreme high-temperature and high-stress environments, including:
Furnace & Heat Treatment Systems
- Radiant tubes
- Burner components
- Furnace linings
- Muffle tubes
Power Generation
- Superheater tubes
- Reheater tubes
- Boiler support components
Petrochemical Industry
- Fluid catalytic cracking (FCC) systems
- Flare tips
- Thermal processing units
Metallurgy & High-Temperature Processing
- Kilns
- Smelting furnaces
- Heat treatment equipment
Waste & Environmental Systems
- Incinerators
- Combustion chambers
- High-temperature exhaust systems
Advanced Manufacturing Process
- High-Quality Raw Material Selection & Billet Heating
- Rotary Piercing (Seamless Forming)
- Cold Drawing / Cold Rolling for Precision Sizing
- Solution Annealing Heat Treatment
- Full Non-Destructive Testing (NDT)
- Ultrasonic Testing (UT)
- Eddy Current Testing (ET)
- Hydrostatic Testing
100% Quality Assurance & Certification
We ensure full compliance with global project standards:
- EN 10204 3.1 / 3.2 Material Test Certificates (MTC)
- 100% PMI (Positive Material Identification)
- Mechanical & Chemical Testing
- Corrosion Testing:
- Intergranular Corrosion (IGC)
- Grain size analysis (ASTM E112)
- Third-Party Inspection:
ABS, TÜV, BV, DNV, SGS available
